Changed how image names are handled

src/MATLAB/+Helper/GetFullImagePath.m

src/MATLAB/+Helper/GetImageName.m

src/MATLAB/+Helper/ParseImageName.m

src/MATLAB/+Load/AddImagePixelsField.m

src/MATLAB/+Load/FindSegLevels.m

src/MATLAB/+Load/OpenData.m

src/MATLAB/+Segmentation/AddNewSegmentHull.m

src/MATLAB/+Segmentation/HematoSegmentation.m

src/MATLAB/+Segmentation/PartialSegDarkCenters.m

src/MATLAB/+Segmentation/ResegmentFromTree.m

src/MATLAB/+UI/DrawCells.m